The depths of Dorothea Quarry revealed
Footage filmed underwater at the notorious Gwynedd site where 25 people have died has been released
The depths of Dorothea Quarry revealed
![The depths of Dorothea Quarry revealed](https://www.teenfm.co.uk/wp-content/uploads/2016/03/Dive3.jpg)
The depths of Dorothea Quarry revealed
Footage filmed underwater at the notorious Gwynedd site where 25 people have died has been released